Portable heart monitor



FIG. 1 is a front side perspective view of the portable heart monitor.

FIG. 2 is a front view of the portable heart monitor.

FIG. 3 is a back view of the portable heart monitor.

FIG. 4 is a right side view of the portable heart monitor.

FIG. 5 is a left side view of the portable heart monitor.

FIG. 6 is a top view of the portable heart monitor; and,

FIG. 7 is a bottom view of the portable heart monitor.

The broken lines in the drawing views are included for the purpose of illustrating portions of the portable heart monitor that form no part of the claimed design. 

The ornamental design for a portable heart monitor, as shown and described. 